Next Previous Up Contents
Next: Maths
Up: Functions
Previous: Times

10.5.7 TrigDegrees

Standard trigonometric functions with angles in degrees.

sinDeg( theta )
Sine of an angle.
cosDeg( theta )
Cosine of an angle.
tanDeg( theta )
Tangent of an angle.
asinDeg( x )
Arc sine. The result is in the range of -90 through 90.
acosDeg( x )
Arc cosine. The result is in the range of 0.0 through 180.
atanDeg( x )
Arc tangent. The result is in the range of -90 through 90.
atan2Deg( y, x )
Converts rectangular coordinates (x,y) to polar (r,theta). This method computes the phase theta by computing an arc tangent of y/x in the range of -180 to 180.


Next Previous Up Contents
Next: Maths
Up: Functions
Previous: Times

STILTS - Starlink Tables Infrastructure Library Tool Set
Starlink User Note256
STILTS web page: http://www.starlink.ac.uk/stilts/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@jiscmail.ac.uk